I am not mentally locked into only buying just one brand, but I do stick with the better brands like DeWalt, Milwaukee, Makita, etc. Some brands have better saws, some have better routers, etc. Sticking to just one brand because of battery type is a good idea, but I have both DeWalt and Milwaukee brands of battery operated tools now. I have DeWalt, Milwaukee, Makita corded circular saws, and a DeWalt 18 volt circular saw, but most of my other 18 volt battery operated tools are DeWalt too. I just buy whichever brand seems to have all of the features that I'm most comfortable with of these better brands.
I did hear once when DeWalt and Porter Cable were coming under one owner, that they had decided to make the DeWalt tools the higher quality and Porter Cable the lower end more economical tools and slightly cheaper tools. Since then, I haven't bought any Porter Cable tools, but recently I've noticed that this price/quality reduction doesn't seem to have happened, so I may again consider accepting a Porter Cable tool into my herd, if it offers what I am looking for and "feels right" in my hands. Most of my routers are DeWalt, because they had the lower weight and balance of what I looked at, and they "felt right" in my hands. The DW618 proved to be the most versatile, so a 3 base kit ended up in my truck and another in the shop. The third DW618 two base kit came from a friend who was getting out of woodworking, and I got it more as a spare than anything, since I knew it had only been used a couple of times. I no longer own any Ryobi tools. Their spare parts prices and poor service drove me away.
Central North Carolina